This is a fairly simple process to start. However, it usually doesn't stop there, because the configuration and expectations you have won't be long in coming.
You should only need a Poe adapter, whether switch or as a power supply unit, although I would prefer a switch. The easiest way to continue setting up the AP is actually via smartphone. If you add the controller software, of course, it gets really exciting.
The flood of information knows no bounds. But it's really good, and not comparable with a fritz box. Please do not connect the switch to port 4 of the FB, but rather when 1 or 2 are free.
Have fun with this great AP. If you have any questions, just write to me.

A PoE adapter or switch is sufficient. That's how I started.